1131423 has 8 divisors (see below), whose sum is σ = 1549488. Its totient is φ = 733824.

The previous prime is 1131421. The next prime is 1131437. The reversal of 1131423 is 3241311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1131423 - 2¹ = 1131421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4986 + ... + 5207.

It is an arithmetic number, because the mean of its divisors is an integer number (193686).

2^1131423 is an apocalyptic number.

1131423 is a deficient number, since it is larger than the sum of its proper divisors (418065).

1131423 is a wasteful number, since it uses less digits than its factorization.

1131423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10233.

The product of its digits is 72, while the sum is 15.

The square root of 1131423 is about 1063.6836935856. The cubic root of 1131423 is about 104.2017471889.

Adding to 1131423 its reverse (3241311), we get a palindrome (4372734).

The spelling of 1131423 in words is "one million, one hundred thirty-one thousand, four hundred twenty-three".